If you look it that way sure but future is unpredictible, its possible that btc will be 50k and also possible that year from now it will be 3k. Its also possible that this coin will be under 1 cent.. all is possible.. so i must look what is most profitable now and from my calculations nicehash is 35% more profitable.. also 2000 miners left suprnova rvn
Yeah it depends. My set up is small and paid for so I can get away with mining at a loss without feeling it. If I had a lot of mining gear sucking down hundreds in electricity then I'd focus on immediate gains. Though even in that case I'd consider devoting at least a little hashing power towards coins I felt could have large increases in value.